US Bridges

CR-478A over Gant Lake Canal

Good

Sumter County, Florida · 2.7 MI North of SR-50 · Structure no. 184055

Built
1968
57 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete
Length
99 ft
3 main spans
Daily traffic
350
2023 count
Owner
County
County Highway Agency

About this bridge

CR-478A over Gant Lake Canal is a concrete slab carrying CR-478A over Gant Lake Canal in Sumter County, Florida. It was built in 1968, so it is 57 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 350 vehicles a day, roughly 16% of them trucks, projected to reach 608 by 2042. The structure is 99 ft (30.2 m) long and 29 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCR-478A
CrossesGant Lake Canal
Location2.7 MI North of SR-50
RouteCounty Highway 478A
CountySumter County
StateFlorida
Coordinates28.57982, -82.09569
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.1 US tons
Inventory rating31.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length99 ft (30.2 m)
Longest span33 ft (10.1 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2023)
Projected traffic608 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR-478A over Gant Lake Canal built?

It was built in 1968, making it 57 years old in 2025.

What condition is CR-478A over Gant Lake Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does CR-478A over Gant Lake Canal carry?

About 350 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is CR-478A over Gant Lake Canal?

The structure is 99 ft (30.2 m) long with a longest span of 33 ft (10.1 m) and a deck 29 ft wide.

Who owns CR-478A over Gant Lake Canal?

It is owned by the County Highway Agency.